Grinding-machine.



1\'Io.762,291.l l 1 PATENTED JUNB14,1904. E. A. DooLITTLB.

GRINDI'NG MACHINE.

APPLICATION FILED 0CT.19. 1903.

N0 MODEL.

No. 76275291. y PATBNTBD JUNE 14, 1904.

K E. Al., DO OLITTLE.

GMNBING MACHINE.

A-'RJILGLATION FILED 0OT.19, 1903.

No MODEL. z SHEETS-SHEET 2.

UNITED Y STATES Patented. .T une 14, 1904.

PATENT OFFICE.

ELIAS A. DOOLITTLE, OF GLENVILLE, OHIO.

GRINDING-NIACHINE.

SPECIFICATION forming part of Letters Patent No. 762,291, dated June 14, 1904.

Application filed October 19, 1903. Serial No. 177,596. (No model.)

T0 all whom it muy con/cern.:

Be it known that I, ELIAs A. DooLI'ITLE, a citizen of the United States, residing at Glenville, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Grinding-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which forma part of this specification.

This invention relates to machines for cleaning and facing brick, and particularly to a machine for cleaning the mortar or cement from old brick by contacting the same with rapidly-rotating carborundum wheels so arranged as to grind the plaster or cement from the face and side of a brick at one operation.

The objects of the invention are, first, to remove all plaster or cement or other material that may adhere to bricks by grinding the same upon a new and convenient form of wheel; second, to provide an adjustable table which may be adjusted to take up wear of the wheels or tilted to vary the feed thereover; third, to apply an exhaust-fan to such a machine to take away all dust from the machine and the operator; fourth, to provide an improved conveyer to deliver the brick from the machine, such conveyer being adjustable to various angles to deliver the brick high or low, and, iifth, to provide means whereby the corners of bricks may be shaped or rounded accurately when desired.

With these and other objects in view the invention is hereinafter described and is illustrated in the accompanying drawings, in'

Which- Figure 1 is a side elevation of the machine. Fig. 2 is a top VYplan view thereof with one of the wearing-plates detached. Fig. 3 is a plan ofthe grinding-wheels and their shaft. Fig. l is a plan view illustrating the device for rounding the corners of a brick; and Figs. 5 and 6 are detail views, in plan and edge View, of said device detached.

Referring specifically to the drawings, the

table or. bed 6, its legs or standards 7, and the fan-box 8 on the under side of the table constitute the framework of the machine. The pulley 9 rotates the shaft 10, carrying the carborundum wheels 11 and 12, which are located at'the middle of the shaft, the larger wheel 11 being placed between the two smaller wheels 12, producing a rectangular corner on each.

side. Outside the wheels are the washers 13, followed by right and left hand nuts 14, which are screwed upon the shaft which is threaded right and left to receive the same to bind the wheels tightly to the shaft.

15 is a pulley for driving fan 16, which draws the dust away through holes 6a in table 6. The tabletop is made in sections, as indi'- cated at 6b, these sections being removable, so that they may be taken off and replaced when they become Worn, and the exhaust-holes are made in these removable sections adjacent the grinding-wheels and over the fan-box. The sections of the table-top are properly recessed to leave an opening through which the wheels project above the table, the smaller wheels slightly and the larger Wheel to a greater extent, as of course. The discharge from the fan-box is indicated at 16a, to which any suitable pipe may be connected for conducting the dust away.

17 represents lugs on under side of table at each corner thereof with slots 17 a, and through the slots are bolts 17", tapped into the legs 7 and capable of being tightened or loosened, as occasion may require, to raise, lower, or tilt the table at various angles by means of the adjusting-screws 18 through the lugs 18, cast on the legs for that purpose. l

19 is a belt-frame hung on the shaft 20, which drives the belt 21 through the roller 22, the shaft being driven from pulley 23. The belt acts to carry the brick away from machine, and means of raising or lowering carrier are shown, comprising segmental brackets 24, which are; slidable under straps 25, fixed to bars 26,' andwhich may be fixed at adjustment by hand-screws at 27.

At 28 are feeding-guides bolted to the top of the table and having slots through which the bolts extend, so that they may be set in line with the side of the larger wheel.

At 29 are delivery-guides to direct the bricks from the wheels onto the conveyer-plate 2l.

For rounding the corners of bricks I provide the device indicated in Figs. 4, 5, and 6. This comprises a holder 30, adapted to be secured to the top of the table adjacent the forward edge of the larger wheel by means of a pivot-bolt 31, and one corner of the holder is rounded, as at 3Q, the opposite corner and sides having a raised rim 33, which serves to hold the brick in place in the holder in connection with a grip 34, which is hinged to the rim 38 and adapted to be pressed down upon the brick to hold it in place by means of a handle 35.

In the operation of the machine, to clean and polish square bricks they are fed over the ,table in opposite direction to the turn of the wheels, and they contact with the wheels in the corner produced where the wheels join, so that one face and side are ground at each pass. After the first pass the bricks are turned over and run over the wheels again, which completes the cleaning operation. Two operators may work on the same machine at the same time, if desired, one on each side, or two machines may be arranged tandem and the belt 21 utilized to carry the bricks from one machine to the other. rIhe adjustment of the delivery-belt 2l permits the bricks to be lowered gently to the ground or to a pile to avoid breaking the corners or edges, and the conveyer can be lifted as the pile grows higher.

The dust produced is drawn through the holes 6 by means of the fan and 'conveyed away to any desired discharge. By tilting the table-top or adjusting it vertically the contact or pressure of the brick on the wheels may be varied.

In using the device for rounding the corners of bricks the brick is placed in the holder and clamped therein, and then by turning the holder on its pivot 31 the corner of the brick is presented to the edge of the larger wheel and is thus ground off to the desired shape.

The use of the machine above described will remedy the present slow and laborious method of cleaning old brick by chopping off the mortar by hand and will enable old brick to be restored to their original clean, square, and smooth condition.

The invention is not limited to the exact construction illustrated in the drawings nor otherwise than is indicated in the following claims.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination with a rotary grindingwheel having a stepped periphery, of a table having guides leading to the step, to present two sides of an article to the wheel simultaneously.

2. The combination with the table, and the grinding-wheel projecting therethrough, of an article-holder pivoted to the table adjacent the wheel and adapted-to swing horizontally toppresent the article to the Wheel.

3. The combination with a grinding-wheel, of an article-holder pivoted to swing in a plane at an angle to the plane of rotation of the wheel, to present the article to the wheeel.

4C. The combination with the table and grinding-wheel, of the holder pivoted `to the table adjacent the wheel and having a clamp to hold an article therein.

In testimony whereof I do aiiX my signature in presence of two witnesses.

ELIAS A. DOOLIT'ILE.

Witnesses:

JosnrH LUCAS, Jol-IN A. BOMMHARDT. 

